Shifting mechanism for gearing.



W. H. GOLDWBLL. SHIPTING HEOHANIS FOB BEARING.

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WILLIAM H. COLDWELL, OF NEWBURGH, NEW YORK.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Original application le. January 19, 1912, Serial No. 672,240. Divided and this application filed April 10,'

1913. Serial N0. 760,162.

To all 'whom it may concern:

- Be it known that I, WILLIAM H. COLD- WELL, a citizen of the United States, residing at Newburgh, in the county of Orange and State of New York, have invented certain new and' useful Improvements in ShiftingMechanism for Gearing; and I do hereby declare thefollowing to lie a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which -it apperta-ins to make and use the Same.

, My invention consists in the novel featuresA hereinafter described, reference being had to` the accompanying drawing which illustrates one embodiment of the invention f selected by m'e for purposes of illustration,

and the said invent-ionlis fully disclosed in the following description and claims.

Referring to the said drawings, Figure 1 represents a perspective view of a driving gearing appliedto a traction roller and pro- -vided with the improved p shiftingv mechanismv which constitutes.my present invention, the coverfplate which is used to inclose the gearing andshifting mechanism being y removed. Fig. 2, is a vertical ysectional view e o scijllating theA eccentric.

on line 2-2 ofFig. 1. Fig. 3 is a horizontal sectional view on line 3-3 of Fig. 1.

The object of my invention is to provide a shifting mechanism for a movable part, especially well adapted for use in reversing the position loffa` gear member forming a part of a reversible driving mechanism, forexample, wherein I employ an eccentric and amovable device, preferably so constructed .as to engage the eccentric on opposite sides thereof, suitable means being provided for Means are also the oscillationsgof the which the diameter of the eccentric which passes through its axis of oscillation will be substantially in alinement with the points of engagement between the eccentric and the movable device, whereby the eccentric will positively lock the vmovable device Awhen in its extreme positions, and as a matten of provided for limiting fact, will lock it in any position ofthe eccentric ,as the slight leverage offered by the eccentric will notbe sullicient to overcome the frictional resistance of the pivotal connection of the eccentric, and of the actuating means connected therewith.

In the embodiment of my invention which I have selected for purposes of illustration and which vis shown in Figs. 1, 2 and 3 of the accompanying drawings, 12 represents the-driving member, or shaft, which may be the driving shaft o-f a high speed explosive engine, orv electric motor or Va shaft driven in any desired manner. The driving shaft 12 has its .end preferably extended into a gear casing 10, as shown, the rear wall of which -is provided with one of the bearings for the shaft, but I do not limit myself to the use of a gear casing. The driving shaft l2 is preferably provided with a worm 13 secured thereto and engaging the teeth of a` horizontally disposed worm wheel 14 mounted loosely on a vertically disposed connecting shaft 15 and held `in position by suitable collars 141 andy 14C secured to the shaft. The vertical shaft '|15 is mounted in bearings in the walls of the gear casing, and a continuously engaged friction clutch is employed for connecting the worm wheel 14, with the shaft 15. In the present'instance I have shown a'cone clutch, the female member 20 vof which is formed with or secured to the worm wheel 14, and a male member 21 is mountedon a spline so as'to turn with the shaft lfhut to be capable of movement longitudinally thereof. A spring 22 surrounds the shaft 15 and is interposed between the male clutch member 21, and a collar 22a adjustablyv secured to the shaft,thus normally holding Kthe clutch members 1n frictionalffengagement, but permitting slippage when the load overcomes'y the frictlonal resistanceof ,the clutch, which latter can be varied by adjusting the tension of the spring by means y'of the collar 22?. I y

.2 represents the` driven. shaft, here represented as the shaft of ar traction roller 1, a portion-of which is shownin the drawing. The shaft 2 is perpendicular" to the shaft 15 and -extends into the gear casing within which it is provided with a bevel gear 19. The shaft 15 is provided with two bevel pincns 17 and 18 secured to a sleeve 16, which is connected to shaft 15 by a spline so as to rotate .therewith but is capable of movement longitudinally of the Shaft. The pinions 17 and 18 are preferably at suchfa distance apart that in a median positionl of the sleeve neither pinion will engage, the bevel gear 19, 1n which position the shaft may be rotated without driving the shaft 2.

23 represents a shifting lever located in the gear casing and pivoted substantially centrally, said lever being provided at one end with a yoke 23b pivotally connected toa collar, rotatable on but secured to move endwise with said sleeve, the other end of said lever being bifurcated and forming arms indicated at 24, 24, each of said arms c being provided with a stop or projection 25.

26 represents-an eccentric or cam, mounted within the gear, case on a short shaft, and

located between and with its peripheral surface in Contact with the. arms 24, 24. The cam or eccentric has formed integrally with or secured to it stop arms 27, 27, each of which is preferably provided with anad? justin'g screw adapted to engage theiadjacent'stop or projection 25. These screws are adjusted to -stop the movement of the shifting lever in each direction when one' `or other of said pinions 17, 18 has been placed accurately in mesh with the bevel gear l19, thus insuring the gearing meshing easily without undue Wear or strain. As the exterior surface which engages the arms 24, 24 is circular the lever 23 Will be maintained vin any position to which 4it may be adjusted, Without the necessity of. any extraneous locking or securing'mechanism, that is to say, i-'n the extreme positions of x the leccentric 26, the points of'y engagementv ever positien it is placed.V Thel shaft'of the veccentrlc 26 (orthe eccentric itself) is provided with an operating arm 29 ywhich may be actuated by hand or yin any desired manner, .and by means of this arm, the sleeve 16 canA be moved te hold the .pinions 17, 18 out of engagement with thegear 19 (the median position) or to throw either of said pinions inteengagement with the ear, and thus drive the shaft 2 in either direction.: i i

'The .gear case is preferably fitted a.

-cov'er 11 and is filled ,withlubricant which,

may be in a liquid orv semisolid condition, thus lkeeping vall the :parts thoroughly lubricated. 4 f i The specicform of driving mechanism herein vshown and described is not spcically claimed herein as the same forms the subject matter of my Tformer application,

Serial No. 672,240, filed January 19, 1912, of which this application is a division. l

A What I claim and desire to secure by Letters Patent is.

1. The combination with a'mo'vable gea-r member, of an oscillatable eccentric, a mov able non-rotatable shifting device independent of, but operatively connected with .said gear member and having bifurcated portions for simultaneously engaging said eccentric on opposite sides of its axis of oscillation,

and means for oscillating said eccentric, said eccentric andsaid shifting device being provided with coacting stops for limiting the oscillating movement -of lthe eccentric,-

Whereby the gear member'will be adjusted exactly in relation to the gear members which it is to engage.

2. The combination with a movable gear with said gear member and having bifurcated portions for simultaneously engaging.

said eccentric onV opposite sides of its axis 1st `member, of an oscillatable eccentric, a pivvoted shifting -device operatively connected of oscillation, and means for oscillating said eccentric, said eccentric and the bifurcated portions of said shifting device being provided with coacting' stops for' limiting the oscillating movement of theeccentric, said respect to the other, whereby the gear mem- `the gear members which it is to engage.

3. Thecombination with a movable gear Vmember, of an roscillatable eccentric, a pivoted shifting device operatively connected with said gear member, and having'bifu'rcated portionsv engaging thev eccentric on opposite sides. of lts axis of oscillation, a projecting stop on eachof said bifurcated coacting stops being adjustable, the onewith ber will be adjusted exactly in relation to."

portions, a pair of stop arms connected `with lsaid eccentric and adjusting screws car-` or engaging the ,stops on the? ried thereby bifurcated portions oA the shifting device. In testimony whereof I aiiix my signature,

yin the presence of two witnesses.

. WILLIAM H. COLDWELL. Witnesses: f

- R.-C.,L`UDLAM,l D. U.' Gmpmcs.. 

